package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.security.MD5Encoder;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        if (!DigestUtils.md5DigestAsHex(password.getBytes()).equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void addEmp(EmployeeDTO employeeDTO) {
        log.info("EmployeeServiceImpl:线程id={}", Thread.currentThread().getId());
        //拷贝对象employeeDTO属性到employee
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        //补齐employee中缺失的属性
        //密码MD5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置employee状态
        employee.setStatus(StatusConstant.ENABLE);

        //设置employee时间
        //使用公共字段自动填充
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/

        //从ThreadLocal中获取当前登录用户的Id
        //使用公共字段自动填充
        /*Long currentLoginEmpId = BaseContext.getCurrentId();
        employee.setCreateUser(currentLoginEmpId);
        employee.setUpdateUser(currentLoginEmpId);*/

        //调用Mapper层，将员工对象存入employee中
        employeeMapper.addEmp(employee);

    }

    /**
     * 员工分页查询----使用pagehelper分页查询插件
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult queryPageEmp(EmployeePageQueryDTO employeePageQueryDTO) {
        //1、使用pagehelper分页查询插件，设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        //2、调用Mapper层进行数据查询并强转返回类型为Page
        Page<Employee> page = employeeMapper.queryPageEmp(employeePageQueryDTO.getName());

        //3、封装PageResult对象并返回
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 修改员工状态
     * @param status
     * @param id
     */
    @Override
    public void modifyEmpStatus(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                //使用公共字段自动填充
                /*.updateUser(BaseContext.getCurrentId())
                .updateTime(LocalDateTime.now())*/
                .build();
        employeeMapper.modifyEmpStatus(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getEmpById(Long id) {
        return employeeMapper.getEmpById(id);
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     * @return
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //拷贝属性值
        BeanUtils.copyProperties(employeeDTO, employee);

        //补充更新人和更新时间
        //使用公共字段自动填充
        /*employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());*/

        employeeMapper.updateEmp(employee);
    }

    /**
     * 修改员工密码
     * @param passwordEditDTO
     */

    @Override
    public void modifyPassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());

        //根据ID查询数据库中的员工信息
        Employee emp = employeeMapper.getEmpById(passwordEditDTO.getEmpId());
        //1.先查询数据库中的旧密码
        String sqlPassword = emp.getPassword();

        //2.将用户输入的旧密码进行md5加密，与数据库中的比较旧密码输入是否正确
        String pwd = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());

       /* //前端已判断输入的密码是否为空
        if (!(pwd != null | pwd != "")){
            throw new PasswordErrorException(MessageConstant.PASSWORD_NOT_NULL);
        }*/

        //旧密码输入错误
        if (!pwd.equals(sqlPassword)){
            throw  new PasswordErrorException(MessageConstant.PASSWORD_OLD_ERROR);
        }

        //3.判断新密码与旧密码是否相同
        if (passwordEditDTO.getOldPassword().equals(passwordEditDTO.getNewPassword())){
            throw new PasswordErrorException(MessageConstant.PASSWORD_OLD_NEW_UNSAME);
        }


        //新建一个员工类，存入改动的信息，密码进行MD5加密
        Employee employee = Employee.builder()
                .id(passwordEditDTO.getEmpId())
                .password(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()))
                //使用公共字段自动填充
                /*.updateUser(BaseContext.getCurrentId())
                .updateTime(LocalDateTime.now())*/
                .build();

        //改动数据库中的信息
        employeeMapper.modifyPassword(employee);

    }


}
